replace leading spaces with tabs

Change-Id: I86783eba0827b58303b10310e9f6b9625e1a27f1
diff --git a/firmware/apps/cardem/main.c b/firmware/apps/cardem/main.c
index 9241c06..ae46794 100644
--- a/firmware/apps/cardem/main.c
+++ b/firmware/apps/cardem/main.c
@@ -152,7 +152,7 @@
 
 	EEFC_ReadUniqueID(g_unique_id);
 
-        printf("\n\r\n\r"
+		printf("\n\r\n\r"
 		"=============================================================================\n\r"
 		"SIMtrace2 firmware " GIT_VERSION " (C) 2010-2016 by Harald Welte\n\r"
 		"=============================================================================\n\r");